Three-year action plan for improving the quality and efficiency of sewage treatment

8. Renovate balcony and unit internal drainage. Further investigate the mismixing of rainwater and sewage pipe networks in residential communities, commercial complexes, public buildings and units and the take-over of total drains, find out the whereabouts of rainwater and sewage, identify problems, implement responsibilities, and implement internal rainwater and sewage diversion transformation. Implement balcony sewage collection and treatment, set up independent sewage collection pipes on the balcony of the new community, and take rain and sewage diversion transformation or interception measures for the balcony sewage of the old community. Strengthen the acceptance and treatment of domestic sewage discharged from the first floor or underground garage, rectify the irregular connection of old residential areas, and study and implement the control mechanism to prevent residents from connecting the sewage riser to the stormwater pipe network.

9. Standardize drainage in industrial enterprises. We will accelerate the separate treatment of industrial wastewater and domestic sewage, and gradually build supporting facilities for the centralized treatment of industrial wastewater in industrial parks. Conduct a comprehensive investigation and evaluation of industrial enterprises whose waste water is connected to the municipal sewage network. If it is determined after evaluation that it cannot be connected to the sewage treatment plant, the directly discharged waste water and tail water that are treated by themselves according to regulations shall not be connected to the municipal sewage network, and the connected industrial enterprises shall be withdrawn within a time limit; If access is allowed, access shall be achieved after preprocessing. Strengthen the monitoring of water quality and quantity of water in the management enterprises, urge the enterprises to set up inspection Wells at the connection points of municipal pipelines, install online monitoring systems and flow control facilities. We will carry out the transformation of rain and pollution diversion in industrial parks and industrial enterprises, and eliminate the problems of direct sewage discharge and mismixing of rain and pollution.

(3) Implementing urban water environment improvement projects.

10. Eliminate inferior Class V water bodies. Implement the requirements of the "Eliminate the inferior and compete for the superior" action of the General River Chief Order in 2021, further investigate the water bodies in urban built-up areas, and further understand the pollution status and sources of the 170 inferior Class V water bodies that have been investigated, strengthen source control and pollution prevention in accordance with the standards of full coverage of the pipe network, full collection of sewage and full treatment of sewage, and prioritize the construction of associated drainage areas to meet the standards. It will be basically completed by the end of 2021.

11. Strengthen the use of ecological tail water. Make full use of high-pressure corridors, high-speed corridors, branch rivers and broken rivers after ecological transformation, etc., promote the construction of tailwater ecological wetlands according to local conditions, and improve the safety of tailwater. The use of river channel to transform functional wetlands, strengthen the site selection demonstration, to ensure the safety of flood control and drainage. Make full use of the tail water of high-quality ecological wetlands as ecological water replenishment for river channels to realize the utilization of tail water resources, and add 10 tail water ecological wetlands.

12. Create clean water boutique river. In each region, select an area or river with good basic conditions, build a drainage area with high standards, build a zero-direct discharge model area or zero-direct discharge river, supplement ecological restoration measures, introduce high-quality tailwater from sewage plants or carry out supplementary water source pretreatment, and optimize the riverbank environment to form a high-quality river with clear water, green bank and beautiful scenery. Improve the visibility of sewage treatment and the public's sense of gain, and transform the results of sewage treatment into high-quality environmental public goods.

(4) Implementing construction management quality and efficiency improvement projects.

13. Improve the quality control of facilities. We will carry out high-quality construction of sewage treatment plants, pipe networks, pumping stations, wetlands, and sludge treatment and disposal facilities, standardize bidding and bidding management, improve the quality of engineering investigation and design, and strictly control the quality of materials and construction. Encourage the establishment of a list of qualified suppliers of pipes and equipment, optimize pipe quality sampling measures, strengthen the inspection and acceptance of hidden works, strictly carry out the closed water test and CCTV inspection before pipeline acceptance, build a traceable and accountable quality control system for construction projects, and comprehensively improve the quality of drainage facilities construction.